Which plow is used to plow up to 5 ft in soft soil?

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When you need deep tillage in soft soil, a plow with vibration and a rotary action is most effective. The vibrotary plow uses vibration to reduce soil cohesion and friction, allowing the cutting action to penetrate and lift soil more easily at greater depths. This combination enables tilling down to about five feet without excessive draft or bogging down, which is why it’s the best choice for soft soil that you want worked down to that depth.

The auger plow is more suited to shallow passes and relies on an auger-like cutting action, so it isn’t optimized for deep tillage. The rip plow is intended to break up hard, compacted layers and subsoil; in soft soil it would overwork the ground and isn’t ideal for controlled deep tillage to a precise five-foot depth. The static plow lacks vibration and adjustable deep-cut capability, so it’s generally limited to shallower work.